# Invisible Copper Transporter ## Description 100 Hz Butterworth Anti-alias Filter with 1ksps Sampling ## Project Details - **Owner:** nf3 - **Created:** 11/22/2025 - **Last Updated:** 11/22/2025 - **Visibility:** Public - **PCB Stackup:** Standard 4 Layer (L2=GND, L3=VDD) - **System Architecture:** graph LR ACS712["ACS712"] --> SallenKeyFilter["Sallen-Key filter"] SallenKeyFilter --> ESP32S3ADC["ESP32-S3 ADC"] ## Key Components ### J1 — [2-644861-2](https://www.flux.ai/adrian95/2-644861-2~vfq.md) - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=644861&DocType=Customer+Drawing&DocLang=English&PartCntxt=2-644861-2&DocFormat=pdf - Role Details: Connector for ACS712-30A module output - Manufacturer Name: TE Connectivity AMP Connectors - Role: Connector - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: 2-644861-2 - Part Type: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### J2 — [2-644861-2](https://www.flux.ai/adrian95/2-644861-2~vfq.md) - License: https://creativecommons.org/licenses/by/4.0/ - Part Type: Connector - Manufacturer Part Number: 2-644861-2 - Role Details: Connector for filter output to ESP32-S3 ADC - Datasheet URL: https://www.te.com/commerce/DocumentDelivery/DDEController?Action=srchrtrv&DocNm=644861&DocType=Customer+Drawing&DocLang=English&PartCntxt=2-644861-2&DocFormat=pdf - Manufacturer Name: TE Connectivity AMP Connectors - Role: Connector **Pins:** - Pin_1 [pin 1] - Pin_2 [pin 2] ### TP1 — [RCSCTE](https://www.flux.ai/lcsc/rcscte~trvg.md) - Role Details: Test point for ADC_IN net - LCSC Part Number: C159866 - Package or Case Code: CONN-SMD_L3.2-1.6 - Role: Signal - JLCPCB Part Class: Extended Part - Part Type: Test Points/Test Rings - Manufacturer Name: KOA - Manufacturer Part Number: RCSCTE **Pins:** - 1 [pin 1] ### TP2 — [RCSCTE](https://www.flux.ai/lcsc/rcscte~trvg.md) - JLCPCB Part Class: Extended Part - Part Type: Test Points/Test Rings - Package or Case Code: CONN-SMD_L3.2-1.6 - LCSC Part Number: C159866 - Manufacturer Part Number: RCSCTE - Role: Signal - Role Details: Test point for GND net - Manufacturer Name: KOA **Pins:** - 1 [pin 1] ### U1 — [MCP6002-E/SN](https://www.flux.ai/jecstronic/mcp6002-esn~qzl.md) - Manufacturer Name: Microchip Technology - Role: Amplification - Datasheet URL: https://ww1.microchip.com/downloads/en/DeviceDoc/MCP6001-1R-1U-2-4-1-MHz-Low-Power-Op-Amp-DS20001733L.pdf - Package or Case Code: 8-SOIC - License: https://creativecommons.org/licenses/by/4.0/ - Manufacturer Part Number: MCP6002-E/SN - Part Type: Operational Amplifier (OP-AMP) - Role Details: Rail-to-rail unity-gain Sallen-Key op-amp for 100 Hz low-pass filter - Package: 8-SOIC **Pins:** - VDD [pin 8] - VINA- [pin 2] - VINA+ [pin 3] - VINB- [pin 6] - VINB+ [pin 5] - VOUTA [pin 1] - VOUTB [pin 7] - VSS [pin 4] ### U2 — [ACS712ELCTR-30A-T](https://www.flux.ai/adrian95/acs712elctr-30a-t~vuf.md) - Datasheet URL: https://www.mouser.com/datasheet/2/1115/ACS712_Datasheet-3178682.pdf - Part Type: Sensor - Manufacturer Name: Allegro MicroSystems - License: https://creativecommons.org/licenses/by/4.0/ - Role: Sensing (Shunt) - Role Details: ACS712-30A Hall-effect current sensor module, ±30 A - Manufacturer Part Number: ACS712ELCTR-30A-T **Pins:** - FILTER [pin 6] - GND [pin 5] - IP-_1 [pin 3] - IP-_2 [pin 4] - IP+_1 [pin 1] - IP+_2 [pin 2] - VCC [pin 8] - VIOUT [pin 7] *The full schematic, PCB layout, bill of materials, and interactive design are available at [https://www.flux.ai/nf3/invisible-copper-transporter~8k](https://www.flux.ai/nf3/invisible-copper-transporter~8k).* --- *Generated from [https://www.flux.ai/nf3/invisible-copper-transporter~8k](https://www.flux.ai/nf3/invisible-copper-transporter~8k)*